My only disappointment with the modules is the poor thermal design. It would have been nice if they built them in a way the could easily be attached to a heatsink.
They only get slightly warm after playing for awhile, but I haven't pushed them very hard. I can imagine they would heat up a lot more if they were used as a small sub amp that was often pushed to clipping.
They only get slightly warm after playing for awhile, but I haven't pushed them very hard. I can imagine they would heat up a lot more if they were used as a small sub amp that was often pushed to clipping.
The 200ASCs are used in many commercial speakers/subwoofers without any fans or heatsinks, so if I were you I'd wait a little before I start worrying 😉
/U.
/U.
Nisbeth said:
I didn't say I was worried, I just said it would have been nice if they were built in a way that allowed a heatsink to be attached.
The continuous output power these modules are capable of is a lot less than the devices could handle if properly cooled. The proof of that is in the datasheet
Just keep in mind that some of the modules are missing some basic protection circuitry - might or might not matter to you ...
buzz1939 said:
Anonymous1, I have a question about the central hole of the modules.
Is it for grounding to the case / mains earth?
I bought a pair from the same source but haven't assembled them yet.
Regards,
George
Is it for grounding to the case / mains earth?
I bought a pair from the same source but haven't assembled them yet.
Regards,
George
TNT said:
You can buy the 1000ASP module from 2 sources - Marchand Electronics,
http://www.marchandelec.com/amplifiers.html
or this guy
http://search.ebay.com/_W0QQsassZaudiotek168
Both sell them for about 500. each, so I would buy from Marchand versus a guy in Taiwan.
FYI, they are blowing out the NHT Power2 for $499. that has 3 B&O modules inside - one 500ASP and 2 500A.
see post 20 -
http://www.avsforum.com/avs-vb/showthread.php?t=1006934
"The Power2 uses one 500ASP and TWO 500As. The amplifier channel on the 500ASP does nothing. This way both channels have absolutely identical behavior since they use exactly the same amplifier module."
If you buy two Power2s, you have 6 modules.
http://www.listenup.com/NHT+POWER+2+-Clearance--p-POWER-2-p-49702.html
Bob
😉
Hello
I build a 500A
http://www.icepower.bang-olufsen.com/files/solutions/icepower500adata.pdf
I doubt on connecting connector JST
the data sheet said something (page 3/16)
and serigraphy said something else
where is the pin 1?
Thanks !
I build a 500A
http://www.icepower.bang-olufsen.com/files/solutions/icepower500adata.pdf
I doubt on connecting connector JST
the data sheet said something (page 3/16)
and serigraphy said something else
where is the pin 1?
Thanks !
Im giving icepower a second chance, bought two 200ACS modules off ebay, i´ll let u know how it goes.
I just wanted to report that I have successfully replaced the 33078/9 with LME49720/40 on my 200ASC boards and they still work. 😉
Does anyone know where the "DC blocking" takes place? Is this some kind of active circuit I'm ignorant of, or are one of the many small ceramics responsible?
Does anyone know where the "DC blocking" takes place? Is this some kind of active circuit I'm ignorant of, or are one of the many small ceramics responsible?
Tekko said:
Besides the few PS filtering caps all the other caps are ceramics, so that would mean ceramic DC blocking caps. 😱
It's too hard for me to trace out a multi-layer board like this; makes me dizzy.
500ASP
We make powered loudspeakers and we have been using the 1000A, 500A, 200ASC and 500ASP quite successfully since 2001. We are very happy with the reliability and sound quality as are our customers.
We are fully aware of the limitations as well as the pluses of the ICE Power modules. Yes, with sine wave testing you cannot use the amplifiers at full power at 20KHz. But music does not have levels at 20KHz that high. With music there are no limitations.
Dan
We make powered loudspeakers and we have been using the 1000A, 500A, 200ASC and 500ASP quite successfully since 2001. We are very happy with the reliability and sound quality as are our customers.
We are fully aware of the limitations as well as the pluses of the ICE Power modules. Yes, with sine wave testing you cannot use the amplifiers at full power at 20KHz. But music does not have levels at 20KHz that high. With music there are no limitations.
Dan
Thanks for the report. I may get brave and try it myself (wish I had bought spares when the modules were cheaper....). Was the change worth it?
bwaslo said:
Worth what? It took 10 minutes and didn't cost me a dime.
Seriously though, I have no idea. This was one of those "I did it because I could" mods. They still sound great, but I didn't bother with a before and after comparison.
I was looking at the boards a few weeks back and i think the dc blocking caps are right at the beginning of the terminal block.
I thought those might be it too, but if you look at the block diagram in the 200ASC datasheet it shows the "DC blocking" comes after the input buffer.
The ceramics by the inputs might just be for RF filtering. I will have to probe around a bit and see if one side of the cap is connected to ground.
The ceramics by the inputs might just be for RF filtering. I will have to probe around a bit and see if one side of the cap is connected to ground.
OK, I did my prodding and found that the two ceramics right by the input pins are not for DC blocking. They connect to the input pins through 1K resistors and their other end connects to ground through a common 1R resistor.
The hunt continues......
The hunt continues......
Is it possible that the 33078 is part of a servo circuit? Maybe this is the DC blocking stage? I can trace one part of the 33078 circuit directly to the speaker output.
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